Arsenal were stunned 1-0 at home by Blackburn in the FA Cup at the weekend, with the big Champions League game to come tomorrow night.
“It is a good opportunity to show that we have character and are men who can fight for each other. That is all you can do,” Wenger said.
“You take a distance in terms of what people say and show how strong and good you are in the next game.
“If we feel sorry for ourselves we would be completely wrong. We have a massive game on Tuesday night and we have to show that we some response in the team.”
